readme.txt

一个音频的可执行程序。可以导入MP3/WAV格式的文件后

  * MS Windows: Audacity's application information which 
    is written to the Windows registry now always contains 
    the full path to the executable. 

  * MS Windows: Fixed problems in trying to set the Windows 
    registry as non-admin user, for file-type associations.

  * Make sure the "Save" command is enabled after changing
    gain and pan sliders.

  * Updated translations.  Added translator credits to the
    "About" window in localized versions.

Changes in 1.2.0-pre3:

  * Fixed bug where Export is grayed out when nothing is
    selected.

  * Fixed crash caused by opening Audacity on a computer with
    a high-end sound card with no mixer support.

  * Fixed crash in Import Raw.

  * Fixed New Stereo Track.

  * Cosmetic fixes for Mac OS X.

  * Support for the VST Enabler on Windows added.

  * Fixed crash if you close Audacity while the Preferences
    dialog is open.

  * Fixed duplicate-character bug in Mac OS X Label Tracks.

  * The recording level control on Linux now adjusts the IGAIN,
    rather than the playthrough level of the recording source.

  * Fixed bug that caused corruption to 16-bit stereo recordings.

  * Fixed bug that caused data loss if you deleted all tracks in
    a saved project and then open a new file into the same window.

  * Added support for alternate audio button order (in Interface
    preferences)

  * Added preliminary support for wxX11

  * Added fully transparent Windows XP icon

  * Fixed crash if you try to record (or play) and no audio
    devices exist, or if the audio device doesn't support the
    mode you selected.

  * Audacity no longer sets the process priority to high while
    recording on Windows.  Users can still do this manually
    using the Task Manager.

  * Fixed bug that caused last ~100 ms of the selection to get
    cut off on Windows.

  * Fixed FFT Filter and Equalization effects dialogs.

  * Fixed bugs in Unix build system (DESTDIR in locale directory,
    choosing libsamplerate instead of libresample)

  * Support for LADSPA plug-ins on Windows added, and 
    three open source LADSPA plug-ins ported to Windows
    (GVerb reverb, SC4 compressor, and Hard Limiter)

Changes in 1.2.0-pre2:

  * Online help completed.  The full manual is nearly complete
    and will be posted to the website for online browsing shortly.

  * Audacity will no longer let you do unsafe editing operations
    while playing or recording.  This eliminates many potential
    crashes.

  * Fixed ability to cancel Quit button.

  * New resampling library, with no restrictions on the maximum or
    minimum rate of resampling.

  * Audacity now supports LADSPA plug-ins on all platforms, and
    supports VST plug-ins through an optional LADSPA plug-in
    called the "VST Enabler", which you can download separately.
    Because of licensing issues, Audacity cannot be distributed
    with VST support built-in.

  * Mac OS X keyboard shortcut problems have been fixed.

  * Mac OS X audio muting problems have been fixed.

  * Mac OS X playback/recording cursor sync problems have been fixed.

  * Silence now displays a straight line again, instead of nothing.

  * Added a vertical ruler to the Waveform dB display.

  * Fixed crash in Change Pitch.

  * You can now Paste if nothing is selected.

  * Canceling an Import operation doesn't cause an extra error
    dialog to appear.

  * Audacity now handles filenames with international characters
    correctly.

  * Now outputs ID3v2.3 tags (instead of ID3v2.4), to be
    compatible with more MP3 players.

  * Minor improvements to build system on Unix systems.

New features in Audacity 1.2:
  * User Interface
    - Vertical zooming of tracks.
    - Improved look and placement of toolbars.
    - New custom mouse cursors.
    - Complete implementation of editable keyboard shortcuts.
    - Find zero-crossings.
    - Mouse wheel can be used to zoom in and out.
    - Multi-Tool mode.
    - Amplify using envelope.
    - Labels can store selections (like Audacity 1.0.0).

  * Effects
    - Repeat Last Effect command
    - Improved VST plug-in support
    - Most effects now have a Preview button
    - Compressor (Dynamic Range Compressor)
    - Change Pitch (without changing tempo)
    - Change Tempo (without changing pitch)
    - Change Speed (changing both pitch and tempo)
    - Repeat (useful for creating loops)
    - Normalize (adjust volume and DC bias)

  * Audio I/O
    - 1-second preview command.
    - Looped play.

  * File I/O
    - Audacity 1.2.0 opens project files from all previous versions
      of Audacity from 0.98 through 1.1.3.
    - Open multiple files from the same dialog.
    - Use a text file to specify a list of audio files to open with offsets.

  * Updated user manual

  * Bug fixes
    - Project files with special characters are no longer invalid.
    - "Scratchy" noises caused by bad clipping are fixed.
    - Audacity no longer exports invalid Ogg files, and does not cut off the
      last few seconds of exported Ogg files.
    - Mono MP3 files now export at the correct speed.
    - Many incorrect results from the Envelope tool have been fixed.
    - The "Export Labels" command now overwrites existing files correctly.
    - The "Plot Spectrum" window displays the correct octave numbers for
      notes.
    - Several memory leaks are fixed.

New features in Audacity 1.1.3:
  * User Interface
    - New Mixer toolbar allows you to control the output
      volume, input volume, and input source directly
      from Audacity.
    - Every track now has its own gain and pan controls.

  * File I/O
    - Uses improved project file format.  (Unfortunately reading
      previous formats, including 1.1.1, is not supported.)
    - Block files (stored in Audacity project directories) now
      use the standard AU format.  Though some Audacity
      meta-information is in these files, they can now be
      read by many other popular audio programs as well.
    - Fixed some bugs relating to reading/writing audio
      files with more than 16 bits per sample.
    - Import RAW is functional again, with a simpler GUI
      but support for far more file formats.  The
      autodetection algorithms are much more accurate than
      in 1.0.

  * Audio I/O
    - Completely rewritten audio I/O, with lower latency
      and minimal chance of buffer underruns while
      recording.

  * Resampling
    - Using high quality resampling algorithms, with the
      option of better quality for mixing than for real-time
      playback

    - Preliminary support for Time Tracks, for changing
      playback speed over time.

  * Many more bug fixes and new features

New features in Audacity 1.1.2:
  * User Interface
    - Fixed bug in Windows version, for track menu commands 
	  "Name..." and "Split Stereo Track"/"Make Stereo Track".
  * Effects
    - Nyquist support on Windows (supports plug-ins written 
	  in Nyquist, an interpreted functional language based 
	  on Lisp).

New features in Audacity 1.1.1:

  * User Interface
    - Tooltips appear in Statusbar.
    - Vertical cursor follows play/record
    - Pause button
    - Drawing tool (with three different modes)
    - Vertical Resizing of stereo tracks is more fun.
    - Adjust selection by click-dragging selection boundary
    - Toolbar button context-sensitive enabling/disabling
    - Better zooming functionality (centers region)
    - Multiple ways to display the cursor position and selection
    - Snap-to selection mode
    - Drag tracks up and down
    - Align and group align functions
    - Cursor save/restore
    - Working history window
  * Effects
    - Effects broken down into three menus: Generate, Effect, and
      Analyze
    - Generate menu lets you generate silence, noise, or a tone
    - Nyquist support (supports plug-ins written in Nyquist,
      an interpreted functional language based on Lisp)
  * Localization
    - Improved localization support
    - More languages available
    - Language selection dialog on startup
  * Mac OS X
    - Support for more audio hardware
    - Support for full-duplex (play while recording)
    - Support for MP3 exporting using LameLib Carbon
  * Unix
    - Audacity now has a man page (it describes command-line
      options and how to set the search path)
  * File Formats
    - Uses libsndfile 1.0, which fixes some bugs and
      improves performance
  * Searching for Files:
    - On Windows and Mac OS, Audacity now looks for
      translations in the "Languages" folder and all plug-ins
      in the "Plug-ins" folder, relative to the program.
    - On Unix, Audacity looks for translations in
      <prefix>/share/locale and looks for everything else
      in <prefix>/share/audacity and also in any paths in
      the AUDACITY_PATH environment variable

New features in Audacity 1.1.0:

  * Core audio processing:
    - Support for 24-bit and 32-bit sample formats
    - Automatic real-time resampling (using linear
        interpolation)
  * Effects:
    - Support LADSPA plugins on Linux / Unix
  * File formats:
    - New XML-based Audacity project format
    - Full Ogg Vorbis support now (importing and exporting)
    - Export to any command-line programs on Unix
    - Support for reading and writing many more types of
        uncompressed audio files, including ADPCM WAV files.
  * Toolbars
    - New toolbar drawing code; automatically adopts your
        operating system's colors
    - New toolbar buttons (Skip to Start, Skip to End)
    - New Edit toolbar
    - Toolbar buttons disable when they're not available
  * User Interface
    - Fully customizable keyboard commands
    - Autoscroll while playing or recording
    - New Ruler, used in main view and in
        FFT Filter effect
    - The waveform now displays the average value in a lighter
        color inside the peak values
  * Localization
    - Audacity can now be localized to different foreign
      languages.

New libraries in Audacity 1.1:

  * libmad for fast MP3 importing
  * libid3tag for editing MP3 file information
  * libsndfile to read and write more audio file formats
  * PortAudio for cross-platform audio playing and recording